. >> one count president obama has already used unmanned cia croan to strike more than 300 suspected terrorists targets. even more than his predecessor. but today we learn just how much authority the administration believes it has to kill without trial or evidence suspected terrorists. even american citizens. newly disclosed justice department document says american citizens tied to al qaeda can be killed if quote an informed high level official believes the target poses an imminent threat. document says it quote does not require the government to have clear evidence. case in point. this american citizen and top al qaeda leader link to several terror attack. he was killed in a 2011 drone strike. human wreaths advocate say the justice department memo goes way too far and. >> justifies essentially a claim that the executive branch can be judge jury and executio executioner. >>reporter: as soon as he became president barack obama stopped cia tactic like world trade center boarding that he considered torture but this justifies out right killing of suspected terrorist. >> how does droppin